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  1. #1
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    How much HP does the ET137 +4mm put out

    How much HP will a 4 tec make if an ET137+4mm is installed with 4 inch air intake, external intercooler, 60 siemens deka injectors, Riva tune with a static 58psi fuel pressure on a RRFPR?


    Engine Tech 137 +4 / RIVA Sea Doo 255/260 XX-2 Charger

    Our new XX2-Charger delivers 15 psi of boost pressure at 8,500rpm producing arm wrenching acceleration and increased top speed. High performance...
    RS17080-SCI-XX2 $649.95



  2. #2
    ptscon's Avatar
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    I'd guesstimate ~275 at like 9k rpm

  3. #3
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    Going of logs and estimating horse power using mapxrpm and a few calculations the skis that have an ET137 wheel and mods you listed typically gain 30-40hp

  4. #4
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    Quote Originally Posted by Davrac View Post
    Going of logs and estimating horse power using mapxrpm and a few calculations the skis that have an ET137 wheel and mods you listed typically gain 30-40hp
    There should be a noticeably difference when upgrading from an ET127 +3mm setup? A 260hp should almost feel like a 300hp with the ET137 and supporting mods?

    Thanks

  5. #5
    Davrac's Avatar
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    Taking the logs from both our gtr’s And comparing both using the same formula to estimate hp the ET137 ski has 50hp more. The ET137 requires more mods to get the most out of it

  6. #6
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    Quote Originally Posted by Davrac View Post
    Taking the logs from both our gtr’s And comparing both using the same formula to estimate hp the ET137 ski has 50hp more. The ET137 requires more mods to get the most out of it
    The customer still insists on keeping the limiter at 8350.
    They simply want more power to spin a longer impeller for top end speed.

    Thank you

  7. #7
    ptscon's Avatar
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    Quote Originally Posted by jackywacky067 View Post
    The customer still insists on keeping the limiter at 8350.
    They simply want more power to spin a longer impeller for top end speed.

    Thank you

    You need to spin that charger, at 8300 it might be a PSI over stock wheel boost so there won't be a significant difference.

  8. #8
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    Quote Originally Posted by ptscon View Post
    You need to spin that charger, at 8300 it might be a PSI over stock wheel boost so there won't be a significant difference.
    ET127 is 10psi boost at 8100
    ET137 is 13-13.5psi at 8100 or 15psi at 8500
    Should be noticeable... 35% more boost

  9. #9
    Davrac's Avatar
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    I am ONLY seeing 14psi at 8800r. But that’s another discussion ��

  10. #10
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    Quote Originally Posted by Davrac View Post
    I am ONLY seeing 14psi at 8800r. But that’s another discussion ��
    Loose hose clamp??

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